https://sourceforge.net/p/mcclidar/wiki/AlgorithmFilterXY/Recent changes to AlgorithmFilterXYenWed, 04 Dec 2013 16:48:23 -0000https://sourceforge.net/p/mcclidar/wiki/AlgorithmFilterXY/<div class="markdown_content"><pre>--- v1 +++ v2 @@ -1,4 +1,4 @@ -Filtering Out Points at Same X,Y #PointsAtSameXY +Filtering Out Points at Same X,Y ============ Interpolation of a raster surface requires that no two points have the same x and y coordinates (it causes problems mathematically). If two or more points are at the same x,y location, then all the points except the lowest point (i.e., with minimum z coordinate) must be non-ground. So those higher points can be classified and removed from the list of unclassified points. </pre> </div>Rupesh ShresthaWed, 04 Dec 2013 16:48:23 -0000https://sourceforge.net7c3dbf7c6fd0e0f1422d7339d3eb78ca50fc42edhttps://sourceforge.net/p/mcclidar/wiki/AlgorithmFilterXY/<div class="markdown_content"><h1 id="filtering-out-points-at-same-xy-pointsatsamexy">Filtering Out Points at Same X,Y #PointsAtSameXY</h1> <p>Interpolation of a raster surface requires that no two points have the same x and y coordinates (it causes problems mathematically). If two or more points are at the same x,y location, then all the points except the lowest point (i.e., with minimum z coordinate) must be non-ground. So those higher points can be classified and removed from the list of unclassified points.</p> <ol> <li>for each x,y location in U₀ with two or points:</li> <li>. . z_lowest = minimum z coordinate of the points at x,y</li> <li>. . for each point P_j at x,y:</li> <li>. . . . if z_j &gt; z_lowest then</li> <li>. . . . . . classify P_j as non-ground and remove it from U₀</li> </ol></div>Rupesh ShresthaWed, 04 Dec 2013 16:48:02 -0000https://sourceforge.net21e07267bcee2752e4d66f5d14c9a67106ffaabb